Add shared macros for stringizing and converting ANSI string constants...

net/base/net_errors.cc

Index: net/base/net_errors.cc
===================================================================
--- net/base/net_errors.cc	(revision 66180)
+++ net/base/net_errors.cc	(working copy)
@@ -5,9 +5,8 @@
 #include "net/base/net_errors.h"
 
 #include "base/basictypes.h"
+#include "base/preprocessor_util.h"
 
-#define STRINGIZE(x) #x
-
 namespace net {
 
 const char kErrorDomain[] = "net";
@@ -19,7 +18,7 @@
   switch (error) {
 #define NET_ERROR(label, value) \
   case ERR_ ## label: \
-    return "net::" STRINGIZE(ERR_ ## label);
+    return "net::" STRINGIZE_NO_EXPANSION(ERR_ ## label);
 #include "net/base/net_error_list.h"
 #undef NET_ERROR
   default: